Patents by Inventor Henry A. Sygnator

Henry A. Sygnator has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Extruding and tapping screw and blank for manufacture of such screw
    Patent number: 4179976
    Abstract: A threaded fastener particularly designed for extruding and forming threads in a sheet metal material. A threaded shank region and threaded, generally, conical point region are interconnected by a thread forming and extruding region which includes a plurality of partially formed threads both in circumferential extent and depth of impression. The thread-forming region tapers downwardly toward the point region at an angle of about 6.degree. to maximize the thread-forming capabilities of the screw.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: December 25, 1979
    Assignee: Illinois Tool Works Inc.
    Inventor: Henry A. Sygnator
  • Rotary sheet metal fastener and fastening system
    Patent number: 4145862
    Abstract: A one-piece sheet metal fastening device for securing two work panels together. The device incorporates a split shank joined at its lower extremity, a split head and a laterally extending locking region at the lower extremity of the shank. The shank includes means to preassemble and rotationally align the fastener within an aperture in a first panel so that a second panel can thereafter be associated with the lower locking region of the fastener.
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: March 27, 1979
    Assignee: Illinois Tool Works Inc.
    Inventor: Henry A. Sygnator